Rood's practice as an art student in Munich brought the problems of vision and color to him from the very start, and he was always in view of the numerous themes that physics and painting share. One of Ogden’s first scientific/ color contribution was a paper he wrote at Columbia on the green tint produced by mixing blue and yellow powders. Where he describes the creation of white by the mixing of yellow and blue light from the spectrum and gives the explanation of green being due to absorption. He uses a Spectra-scope, a physics instrument used to measure properties of light, to view these strips of paper. He then uses “Colour tops” which were discs that he spun, that had accurately proportioned amounts of color to recreate the mixing of colors yet just with light.
Ogden Roodalso followed up on the change of an objects color due to its material. He used different surfaces such as one coated with magnesium oxide (A white solid form) and one coated with soot (looks like dirt powdery/smudglable substance), which he then studied under a microscope. He determined that the size of the particles of which the surface is made up of effects the reflection of light and therefore; the color.
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